Lord Drummond’s second son, David, accompanied by a body of
retainers, set out to forcibly evict the Murrays from Ochtertyre, but the Murrays were warned of Drummond's attack and were well prepared. The turning point in the ensuing battle came when a party of McRobbies from
Balloch and Faichneys from
Argyllshire joined forces with the Drummonds against the Murrays. The Murrays were forced to the north and made a final stand at
Hill at Knock Mary on the other side of
Rottenreoch, from Monzievard kirk. Many Murrays were killed and the remainder fled back towards Ochtertyre. As the Drummonds made their way back in triumph to
Drummond Castle they came upon Duncan Campbell of Dunstaffnage with a party of his clan members. He also had a score to settle with the Murrays, as his father-in-law and two of his sons had been murdered by them some time before. Campbell persuaded the Drummonds to resume their pursuit of the Murrays, and the combined Drummonds and Campbells marched towards Ochtertyre. About 20 Murray men fled and took refuge in the nearby church at
Monzievaird, close by Hosh. One shot an arrow from the window of the church, killing one of the Drummonds searching for them outside but revealing their hiding place. The Drummonds retaliated by gathering all the brushwood they could find and stacking it against the church, which was roofed with
thatch and
heather, and lighting it. Only one of the Murray men survived the fire; the rest were killed either inside the church or trying to escape the building, reportedly to the accompaniment of a
piper. The one surviving Murray escaped death by jumping from a window. Thomas Drummond recognized him as his cousin and taking pity on him spirited him away. This act of compassion did not endear Thomas to the rest of his clan; he was forced to leave
Crieff and lived in exile in Ireland for many years. Thomas eventually returned to Scotland after the Murrays had regained their power and showed their gratitude by giving him a small estate in
Perthshire. This estate originally known as Drummond-Ernoch or Drummond of Ireland, now called
Drummonderinoch, lies about a mile southeast of
Comrie. The Faichneys, from Argyll, subsequently obtained land holdings around
Strageath,
Muthill and
Innerpeffray. Over the years oral history has placed the number of dead Murrays as high as 120 men along with wives and children,{{cite book |last1=Lindsay |first1=Robert |author-link1=Robert Lindsay of Pitscottie |year=1565 |editor1-last=Dalyell |editor1-first=J.G. |editor1-link=John Graham Dalyell ==Outcome==